Easy Genius Science Projects with Electricity and Magnetism: Great Experiments and Ideas Book

Introduction 7

Science Fairs 7

Safety First 8

Your Notebook 9

The Scientiffic Method 10

Chapter 1 Electricity: A First Look with Early Scientists 13

1.1 William Gilbert and Static Electricity 14

1.2 Benjamin Franklin and Static Electricity 17

1.3 Inducing Charge 20

1.4 Detecting Charge: An Electroscope 22

Chapter 2 Magnetism: A First Look with Early Scientists 27

2.1 Magnets, Compasses, and Poles 28

2.2 Magnets, Magnetic Matter, and Nonmagnetic Matter 31

2.3 Our Magnetic Earth 34

2.4 Make a Magnet or Two 37

2.5 Magnetic Dip 41

2.6 A Magnetic Field 43

Chapter 3 Electric cells, Batteries, Circuits, Currents, Volts, and Amps 47

3.1 Volta's Battery: A Voltaic Pile 49

3.2 Making a Battery from Electric Cells 52

3.3 A Simple Electric Circuit: Bulb, Wire, and D-Cell 56

3.4 Another Circuit: Bulb, Bulb Holder, Wires, Battery, and Meters 58

3.5 A Series Circuit and a Parallel Circuit 62

3.6 A Lemon Cell 65

3.7 An LED 67

3.8 Electrical Resistance 68

3.9 Electrical Resistance and Meters 73

3.10 Electrical Resistance and a Rheostat 74

3.11 Electrical Resistance, a Short Circuit, and a Fuse 77

3.12 Electrical Resistance and Copper Plating 78

Chapter 4 Electricity and Magnetism: A Connection 83

4.1 Orsted's Discovery and Ampere's Rule 84

4.2 Ampere, a Galvanometer, and Electric Meters 87

4.3 Ampere and Magnetic Forces on Side-by-Side Electric Currents 90

4.4 Magnets from Electric Currents 93

4.5 An Electromagnet 95

4.6 Conductors and Nonconductors 97

4.7 Curie Point 100

Chapter 5 Faraday, Electric Motors, and Generators 103

5.1 The Motor Principle: The Force on a Current in a Magnetic Field104

5.2 A Simple Electric Motor 107

5.3 Electricity from Magnets: Electromagnetic Induction 110

5.4 A Motor as a Generator 113

5.5 Check Your Family's Electric Bill and the Wattage of Appliances 116

Answers to Questions 119

Appendix: Science Supply companies 120

Glossary 121

Further Reading and Internet Addresses 123

Index 125

About the Author 128